ignore/types: enhance terraform default filter

The default filter for terraform only checks for *.tf files, but there
are quite few other terraform filetypes.

The explanation for all of them can be found below (including link to
documentation from Hashicorp at time of writing)

- *.tf.json & *.tfvars.json is to capture the files written in
  JSON-based variant of the Terraform language
    - https://developer.hashicorp.com/terraform/language/files
- *.tfvars is used to supply variables
    - https://developer.hashicorp.com/terraform/cloud-docs/workspaces/variables#6-auto-tfvars-variable-files
- .terraform.lock.hcl is used as a Dependency lock file
    - https://developer.hashicorp.com/terraform/language/files/dependency-lock
- terraform.rc & .terraformrc, *.tfrc
    - https://developer.hashicorp.com/terraform/cli/config/config-file

PR #2412

crates/ignore/src/default_types.rs

@@ -251,7 +251,11 @@ pub const DEFAULT_TYPES: &[(&str, &[&str])] = &[
     ("tex", &["*.tex", "*.ltx", "*.cls", "*.sty", "*.bib", "*.dtx", "*.ins"]),
     ("texinfo", &["*.texi"]),
     ("textile", &["*.textile"]),
-    ("tf", &["*.tf"]),
+    ("tf", &[
+        "*.tf", "*.auto.tfvars", "terraform.tfvars", "*.tf.json",
+        "*.auto.tfvars.json", "terraform.tfvars.json", "*.terraformrc",
+        "terraform.rc", "*.tfrc", "*.terraform.lock.hcl",
+    ]),
     ("thrift", &["*.thrift"]),
     ("toml", &["*.toml", "Cargo.lock"]),
     ("ts", &["*.ts", "*.tsx", "*.cts", "*.mts"]),